package com.demo.dao.impl;

import com.demo.dao.Paper;

public class TextPaper implements Paper {
    private int charPerLine = 16;//每行字符数
    private int linePerPage = 5;//每行页数
    private String  content = "";//纸张中内容
    private int posX = 0;//当前横向位置，从0到charPerLine - 1
    private int posY = 0;//当前行数，从0到charPerPage - 1
    private int posP = 1;//当前页数
    @Override
    public void putInChar(char c) {
        content += c;
        ++posX;
        //判断是否换行
        if (posX == charPerLine){
            content += Paper.newline;
            posX = 0;
            ++posY;
        }

        //判断是否翻页
        if (posY == linePerPage){
            content += "== 第" + posP + "页 ==";
            content += Paper.newline + Paper.newline;
            posY = 0;
            ++posP;
        }
    }

    @Override
    public String getContent() {
        String ret = this.content;
        if (!(posX == 0 && posY == 0)){
            int count = linePerPage - posY;
            for (int i = 0; i < count; i++) {
                ret += Paper.newline;
            }
            ret += "== 第" + posP + "页 ==";
        }
        return ret;
    }

    public void setCharPerLine(int charPerLine) {
        this.charPerLine = charPerLine;
    }

    public void setLinePerPage(int linePerPage) {
        this.linePerPage = linePerPage;
    }
}
